Ok, so I had the day off today and decided to install this aux in cable.
I am not going to go into detail about my whole install, and where i mounted it and yadda yadda yadda. I'm gonna keep it short just so you get the just of it.
So i took the HU out of course and the wires i tapped into of the 14 pin cd changer connector is wht/grn-RCH+ (right channel), blk/wht-LCH+ (left channel), and for the ground or common i used Lt Blu-SHD GND.
I had a 3.5mm head phone cable male to male and cut one end off. Spliced the wire and determined which one was R and L with an ohm meter, and joined it to those wires.
Turned the HU on, pressed the cd/chng button. Once for just cd, and once again for the changer mode, and plugged my ipod in and all is good. The sound quality is perfectly clear, and very loud. I would imagine so because there is very little signal loss because i am going directly to the harness and the only difference you would get is through the cable if any.
So I also determined that you can have a cd in the HU playing and then press the cd/chng button and then your ipod will start playing no problem.
However, you cannot have any cd's in the changer. Once guy on the web said you can have a blank cd with a silent track playing in one spot on your changer, but I for one have not used my changer since I got the car and to tell you the truth I dont think its working, because it flashes ERR on the screen of the headunit. The cd player of the head unit plays fine and I have no use for a cd changer, except for the fact that it fills a spot on the dash. Maybe in the future I will install a deck in its place. I also tried, while the ipod was playing, press one of the 6 changer buttons and the music to the ipod cut out because you are requesting a cd, but if you press the eject button, the music from the ipod plays again.
So in Conclusion I think this has been a successful mod, and hopefully other people have the same success.